And now Girls actress Zosia Mamet has also turned to the light side, posting a snapshot of herself with a bright blonde hair style, just in time for New York Fashion week.

The usually 26-year-old brunette, who plays Shoshanna Shapiro on the HBO series posted the photograph on her Instagram account alongside the caption: '#RMspring2015.'

The lighter side: Zosia Mamet showed off her new platinum bob on Wednesday, weeks after her Girls co-star Lena Dunham also changed her style

Brunette look: Zosia as pictured in July with her brown hair

The show featured her sporting a chic black blazer over a white shirt and browsing throughhandbags.

Designer Rebecca Minkoff also posted the shot, with the caption: Decisions, decisions. 'One of our favorite Girls @zosia_mamet picking out an outfit for our #nyfw show #RMSPRING.'

Zosia follows in the footsteps of trailblazer Lena, who debuted a dramatic blonde bowl cut a few weeks ago via her Instagram account.

Both Zosia and Lena recently finished filming the latest season of Girls, so can afford to experiment with style and colour.

‘That's a wrap on season 4 of @girlsHBO- more love for this cast and crew than my little heart can contain!’ Lena tweeted the day before she showed off her new hairdo.

Lena
previously cut her brunette locks into a bob after wrapping season two
of Girls, after her character Hannah Horvath did the same on the show.

Meanwhile Zosia recently opened up about her eating disorder in an essay penned for Glamour magazine, revealing she started worrying about her weight at the age of eight.

'I'm not fat; I've never been fat,' she wrote. 'But ever since then, there has been a monster in my brain that tells me I am - that convinces me my clothes don't fit or that I've eaten too much. At times it has forced me to starve myself, to run extra miles, to abuse my body.'

Dramatic new look: Lena Dunham unveiled her new blonde bowl cut on Instagram last month

Zosia says she's now at a healthy weight - but the voice inside her head still lingers. She hopes one day it will be only 'a whisper.'

The actress chose to tell her story with the goal of diminishing the stigma around eating disorders and offering support and hope for her fellow sufferers.

'Let's remind one another that we're beautiful,' she writes. 'Maybe you'll help a friend. Maybe you'll help yourself. And if you're reading this and you're suffering, please know you're not alone. Tell someone: The people who love you will listen, I promise. And you'll feel better.'

Brunette quartet: The Girls stars in their more familiar guises with Lena, Jemima Kirke,
Zosia and Allison Williams